CN108007750B - A test piece for measuring the heat penetration time of titanium alloy billets - Google Patents
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- 238000012360 testing method Methods 0.000 title claims abstract description 154
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Abstract
本发明属于钛合金锻造加工及热处理领域,涉及一种测算钛合金坯料热透时间的试验件。它包括试块(2)和试棒(3),试块(2)的横截面形状为:圆形、正方形、正六边形或正八边形,试棒(3)是一个圆柱轴。本发明提供了一种测算钛合金坯料热透时间的试验件,大幅度提高了测算精度;简化了装配操作,便于在生产中实施。
The invention belongs to the field of titanium alloy forging processing and heat treatment, and relates to a test piece for measuring the heat penetration time of a titanium alloy blank. It comprises a test block (2) and a test rod (3). The cross-sectional shape of the test block (2) is: circle, square, regular hexagon or regular octagon, and the test rod (3) is a cylindrical shaft. The invention provides a test piece for measuring the heat penetration time of a titanium alloy billet, which greatly improves the accuracy of the measurement, simplifies the assembly operation, and facilitates implementation in production.
Description
技术领域technical field
本发明属于钛合金锻造加工及热处理领域,涉及一种测算钛合金坯料热透时间的试验件。The invention belongs to the field of titanium alloy forging processing and heat treatment, and relates to a test piece for measuring the heat penetration time of a titanium alloy blank.
背景技术Background technique
钛合金具有质轻、高强、耐腐蚀的优良性能,是航空、航天和航海等领域的重要结构材料。随着我国钛合金研究与应用水平的提高,钛合金的应用领域与范围不断拓展,钛合金制件的牌号、种类、结构形式、尺寸等越来越丰富。为此,针对不同的钛合金制件性能需求,需要更有针对性的制定热机械处理工艺,实现制件组织的均匀与性能的稳定,同时降低工艺开发与试验成本,提高效益。这其中,不同加热制度下的保温时间是钛合金坯料热机械处理工艺较为重要的工艺参数之一。不同几何形状、不同尺寸或不同牌号的坯料形式,加热保温时间存在较大差异。如何精确测算保温时间,对于钛合金坯料的组织均匀性及组织的精细控制十分重要。例如,采用β锻造或准β锻造工艺制备的钛合金制件,锻前加热时间既要保证坯料芯部组织转变及微区成分均匀化的完成,又要避免β相过分长大。因此,需要控制加热时间在一个合理的区间。为此,针对几何形状和尺寸不同的坯料,有必要进行热透时间的精确测定。Titanium alloy has excellent properties of light weight, high strength and corrosion resistance, and is an important structural material in the fields of aviation, aerospace and navigation. With the improvement of the research and application level of titanium alloys in my country, the application fields and scope of titanium alloys have been continuously expanded, and the grades, types, structural forms and sizes of titanium alloy parts have become more and more abundant. For this reason, according to the performance requirements of different titanium alloy parts, it is necessary to formulate a more targeted thermomechanical treatment process to achieve the uniformity of the parts structure and the stability of the performance, while reducing the cost of process development and testing and improving the benefits. Among them, the holding time under different heating systems is one of the more important process parameters for the thermomechanical treatment of titanium alloy billets. Different geometric shapes, different sizes or different grades of billet form have great differences in heating and holding time. How to accurately measure the holding time is very important for the uniformity of the structure of the titanium alloy billet and the fine control of the structure. For example, for titanium alloy parts prepared by β forging or quasi-β forging process, the heating time before forging should not only ensure the completion of the microstructure transformation of the billet core and the homogenization of the micro-area composition, but also avoid excessive growth of the β phase. Therefore, it is necessary to control the heating time within a reasonable range. For this purpose, it is necessary to carry out an accurate determination of the penetration time for blanks with different geometries and dimensions.
中国专利“确定TC17钛合金坯料在热处理炉内的加热时间的方法”(201510995923.X)公开了一种针对圆柱形棒料的打孔埋热电偶的测温装置,实现了对孔内和外壁温度的实时监控。其缺点是:第一、测算精度差,不能排除由于热电偶的热导率远高于钛合金坯料的热导率而带来的误差;只能给出到温时间,不能直接判断坯料是否热透,即无法直接获知坯料心部组织转变完成与否;第二、测温装置与热处理炉间的装配操作复杂,实施不方便。The Chinese patent "Method for Determining Heating Time of TC17 Titanium Alloy Billet in Heat Treatment Furnace" (201510995923.X) discloses a temperature measurement device for perforated and buried thermocouples of cylindrical bars, which realizes the measurement of the inner and outer walls of the hole. Real-time monitoring of temperature. The disadvantages are: first, the measurement accuracy is poor, and the error caused by the thermal conductivity of the thermocouple is much higher than that of the titanium alloy billet cannot be ruled out; only the time to temperature can be given, and it is not possible to directly judge whether the billet is hot or not. It is impossible to directly know whether the transformation of the core of the billet is completed or not. Second, the assembly operation between the temperature measuring device and the heat treatment furnace is complicated and inconvenient to implement.
发明内容SUMMARY OF THE INVENTION
本发明的目的是:提供一种测算钛合金坯料热透时间的试验件,以便提高测算精度;简化装配操作,便于在生产中实施。The purpose of the present invention is to provide a test piece for measuring the heat penetration time of a titanium alloy billet, so as to improve the accuracy of the calculation, simplify the assembly operation, and facilitate the implementation in production.
本发明的技术方案是:一种测算钛合金坯料热透时间的试验件,其特征在于:它包括试块2和试棒3,试块2的横截面形状为:圆形、正方形、正六边形或正八边形,在试块2上有一个贯通上下端面的、孔径为D的中心孔,中心孔为光孔或者螺纹孔;中心孔为光孔时,D=6mm~20mm;中心孔为螺纹孔时,螺纹孔的最大内径为D;当试块2为圆柱体时,试块2的高度H大于试块2横截面的直径;当试块2为正棱柱体时,试块2的高度H大于试块2横截面内切圆的直径;试棒3是一个圆柱轴,当试块2的中心孔为光孔时,试棒3的外径与试块2的中心孔过盈配合;当试块2的中心孔为螺纹孔时,试棒3的外圆柱面上带有外螺纹,试棒3的外螺纹拧进试块2中心孔的螺纹孔内;试棒3的上端高出试块2的上端面ΔH,试棒3的下端低于试块2的下端面ΔH,ΔH=10mm~100mm;试块2和试棒3的材质与被测钛合金坯料的材质相同,试棒3组织中等轴初生α相的含量不少于70%。The technical scheme of the present invention is: a test piece for measuring the heat penetration time of a titanium alloy billet, which is characterized in that it comprises a
本发明的优点是:提供了一种测算钛合金坯料热透时间的试验件,大幅度提高了测算精度;简化了装配操作,便于在生产中实施。The advantages of the invention are that: a test piece for measuring the heat penetration time of the titanium alloy blank is provided, which greatly improves the measuring and calculating accuracy; the assembling operation is simplified, and the implementation in production is convenient.
附图说明Description of drawings
图1是本发明试验件的结构示意图。FIG. 1 is a schematic structural diagram of a test piece of the present invention.
图2是图1的俯视图。FIG. 2 is a plan view of FIG. 1 .
具体实施方式Detailed ways
下面对本发明做进一步详细说明。参见图1、2,一种测算钛合金坯料热透时间的试验件,其特征在于:它包括试块2和试棒3,试块2的横截面形状为:圆形、正方形、正六边形或正八边形,在试块2上有一个贯通上下端面的、孔径为D的中心孔,中心孔为光孔或者螺纹孔;中心孔为光孔时,D=6mm~20mm;中心孔为螺纹孔时,螺纹孔的最大内径为D;当试块2为圆柱体时,试块2的高度H大于试块2横截面的直径;当试块2为正棱柱体时,试块2的高度H大于试块2横截面内切圆的直径;试棒3是一个圆柱轴,当试块2的中心孔为光孔时,试棒3的外径与试块2的中心孔过盈配合;当试块2的中心孔为螺纹孔时,试棒3的外圆柱面上带有外螺纹,试棒3的外螺纹拧进试块2中心孔的螺纹孔内;试棒3的上端高出试块2的上端面ΔH,试棒3的下端低于试块2的下端面ΔH,ΔH=10mm~100mm;试块2和试棒3的材质与被测钛合金坯料的材质相同,试棒3组织中等轴初生α相的含量不少于70%。The present invention will be described in further detail below. Referring to Figures 1 and 2, a test piece for measuring the heat penetration time of a titanium alloy billet is characterized in that: it includes a
为了进一步提高测算精度,在试棒3与中心孔端口的缝隙处涂覆高温防氧化涂料1。所述的高温防氧化涂料是由北京天力创公司生产的高温防氧化涂料。In order to further improve the measurement accuracy, the high temperature
实施例1Example 1
测算直径为500mm的TC4钛合金圆柱形坯料热透时间的试验件,由试块2和试棒3组成,试块2和试棒3的材质均为TC4钛合金,试棒3组织中等轴初生α相的含量为70%。试块2的横截面为直径为500mm的圆形,试块2的高度H为550mm,在试块2上有一个贯通上下端面的、孔径为D的中心光孔,D=20mm;试棒3是一个圆柱轴,试棒3的外径与试块2的中心孔过盈配合,配合后ΔH=100mm。在试棒3与中心孔端口的缝隙处涂覆北京天力创公司生产的高温防氧化涂料。The test piece for measuring the heat penetration time of a TC4 titanium alloy cylindrical billet with a diameter of 500mm is composed of a
实施例2Example 2
测算直径为100mm的TC6钛合金圆柱形坯料热透时间的试验件,由试块2和试棒3组成,试块2和试棒3的材质均为TC6钛合金,试棒3组织中等轴初生α相的含量为75%。试块2的横截面为直径为100mm的圆形,试块2的高度H为150mm,在试块2上有一个贯通上下端面的、孔径为D的中心光孔,D=6mm;试棒3是一个圆柱轴,试棒3的外径与试块2的中心孔过盈配合,配合后ΔH=10mm。在试棒3与中心孔端口的缝隙处涂覆北京天力创公司生产的高温防氧化涂料。The test piece for measuring the heat penetration time of the TC6 titanium alloy cylindrical billet with a diameter of 100mm is composed of
实施例3Example 3
测算横截面内切圆直径为400mm的TA19钛合金正四棱柱形坯料热透时间的试验件,由试块2和试棒3组成,试块2和试棒3的材质均为TA19钛合金,试棒3组织中等轴初生α相的含量为80%。试块2的横截面为内切圆直径为400mm的正方形,试块2的高度H为420mm,在试块2上有一个贯通上下端面的、孔径为D的中心光孔,D=12mm;试棒3是一个圆柱轴,试棒3的外径与试块2的中心孔过盈配合,配合后ΔH=40mm。在试棒3与中心孔端口的缝隙处涂覆北京天力创公司生产的高温防氧化涂料。The test piece for measuring the heat penetration time of the TA19 titanium alloy regular quadrangular billet with a diameter of 400mm inscribed circle in the cross section is composed of
实施例4Example 4
测算横截面内切圆直径为300mm的TA15钛合金正六棱柱形坯料热透时间的试验件,由试块2和试棒3组成,试块2和试棒3的材质均为TA15钛合金,试棒3组织中等轴初生α相的含量为85%。试块2的横截面为内切圆直径为300mm的正六边形,试块2的高度H为400mm,在试块2上有一个贯通上下端面的、孔径为D的中心螺纹孔,D=10mm;试棒3是一个圆柱轴,试棒3的外圆柱面上带有外螺纹,试棒3的外螺纹拧进试块2中心孔的螺纹孔内,配合后ΔH=50mm。在试棒3与中心孔端口的缝隙处涂覆北京天力创公司生产的高温防氧化涂料。The test piece for measuring the heat penetration time of the TA15 titanium alloy regular hexagonal billet with a diameter of 300mm inscribed circle in the cross section is composed of
实施例5Example 5
测算横截面内切圆直径为200mm的TC11钛合金正八棱柱形坯料热透时间的试验件,由试块2和试棒3组成,试块2和试棒3的材质均为TC11钛合金,试棒3组织中等轴初生α相的含量为90%。试块2的横截面为内切圆直径为200mm的正八边形,试块2的高度H为250mm,在试块2上有一个贯通上下端面的、孔径为D的中心螺纹孔,D=8mm;试棒3是一个圆柱轴,试棒3的外圆柱面上带有外螺纹,试棒3的外螺纹拧进试块2中心孔的螺纹孔内,配合后ΔH=25mm。在试棒3与中心孔端口的缝隙处涂覆北京天力创公司生产的高温防氧化涂料。The test piece for measuring the heat penetration time of the TC11 titanium alloy regular octagonal billet with a diameter of 200mm inscribed in the cross section is composed of a
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高强度、高韧性、高模量钛合金研究进展;敖宏 等;《金属学报》;20020930;第38卷;第22-24页 * |
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